Date: Sun, 11 May 2003 12:05:23 -0400 From: Don Bowman <don@sandvine.com> To: 'Kevin Day' <toasty@dragondata.com>, Don Bowman <don@sandvine.com> Cc: freebsd-net@freebsd.org Subject: RE: polling(4) and idle time/cpu usage percentages Message-ID: <FE045D4D9F7AED4CBFF1B3B813C8533701B36610@mail.sandvine.com>
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From: Kevin Day [mailto:toasty@dragondata.com] > At 10:44 AM 5/11/2003, you wrote: > >I tried the hack, as below. The other thing that makes idle > >wildly inaccurate is the symmetric multi-threading on the xeon > >(aka hyperthreading). > > Smack me if I'm wrong, but you can't compile the kernel with > DEVICE_POLLING > active at the same time as SMP. Without SMP you don't get any of the > advantages/effects of HTT. > > (or has polling been made to play nice with SMP in -current?) DEVICE_POLLING actually works fine with SMP, there was just some question as to whether it was the best way to make use of the SMP. I just removed the #error in kern_poll.c in the #ifdef SMP case. --don
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